Topology　optimization　(TO)　has　experienced　substantial　progress　in　both　scholarly　research　and　practical　engineering　applications.　Recent　years　have　witnessed　extensive　research　on　TO　approaches　incorporating　the　fail-safe　concept,　with　a　particular　emphasis　on　potential　failures.　This　paper　proposes　a　TO　methodology　on　the　offshore　wind　turbine　(OWT)　jacket　structure,　focusing　on　the　unexpected　failure　modes.　The　initial　step　involves　constructing　the　formulation　for　maximum-minimization　TO.　A　series　of　optimized　structures　can　be　generated　by　varying　the　sizes　of　individual　damage　populations　and　overall　failure　zones.　A　5　MW　OWT　and　jacket　structure　have　been　selected　as　the　reference　model.　The　external　loads　acting　on　the　jacket　structure　are　determined　by　given　environmental　conditions,　as　assessed　using　the　DNV　Bladed　™　package.　The　feasibility　of　an　optimized　structure　is　evaluated　by　comparing　its　static　behaviors,　such　as　maximum　displacement　and　von　Mises　stress,　to　those　of　the　reference　structure.　The　investigation　focuses　on　the　fundamental　frequencies　of　the　optimized　structure　under　various　damage　populations.　The　discovery　demonstrates　the　superiority　of　the　suggested　methodology　in　the　case　of　a　potential　failure.　©　2024　Institution　of　Structural　Engineers